Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 1 | /* |
| 2 | * tegra20_ac97.c - Tegra20 AC97 platform driver |
| 3 | * |
| 4 | * Copyright (c) 2012 Lucas Stach <dev@lynxeye.de> |
| 5 | * |
| 6 | * Partly based on code copyright/by: |
| 7 | * |
| 8 | * Copyright (c) 2011,2012 Toradex Inc. |
| 9 | * |
| 10 | * This program is free software; you can redistribute it and/or |
| 11 | * modify it under the terms of the GNU General Public License |
| 12 | * version 2 as published by the Free Software Foundation. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | */ |
| 20 | |
| 21 | #include <linux/clk.h> |
| 22 | #include <linux/delay.h> |
| 23 | #include <linux/device.h> |
| 24 | #include <linux/gpio.h> |
| 25 | #include <linux/io.h> |
| 26 | #include <linux/jiffies.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/of.h> |
| 29 | #include <linux/of_gpio.h> |
| 30 | #include <linux/platform_device.h> |
| 31 | #include <linux/pm_runtime.h> |
| 32 | #include <linux/regmap.h> |
| 33 | #include <linux/slab.h> |
| 34 | #include <sound/core.h> |
| 35 | #include <sound/pcm.h> |
| 36 | #include <sound/pcm_params.h> |
| 37 | #include <sound/soc.h> |
Lars-Peter Clausen | 3489d50 | 2013-04-03 11:06:03 +0200 | [diff] [blame] | 38 | #include <sound/dmaengine_pcm.h> |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 39 | |
| 40 | #include "tegra_asoc_utils.h" |
| 41 | #include "tegra20_ac97.h" |
| 42 | |
| 43 | #define DRV_NAME "tegra20-ac97" |
| 44 | |
| 45 | static struct tegra20_ac97 *workdata; |
| 46 | |
| 47 | static void tegra20_ac97_codec_reset(struct snd_ac97 *ac97) |
| 48 | { |
| 49 | u32 readback; |
| 50 | unsigned long timeout; |
| 51 | |
| 52 | /* reset line is not driven by DAC pad group, have to toggle GPIO */ |
| 53 | gpio_set_value(workdata->reset_gpio, 0); |
| 54 | udelay(2); |
| 55 | |
| 56 | gpio_set_value(workdata->reset_gpio, 1); |
| 57 | udelay(2); |
| 58 | |
| 59 | timeout = jiffies + msecs_to_jiffies(100); |
| 60 | |
| 61 | do { |
| 62 | regmap_read(workdata->regmap, TEGRA20_AC97_STATUS1, &readback); |
| 63 | if (readback & TEGRA20_AC97_STATUS1_CODEC1_RDY) |
| 64 | break; |
| 65 | usleep_range(1000, 2000); |
| 66 | } while (!time_after(jiffies, timeout)); |
| 67 | } |
| 68 | |
| 69 | static void tegra20_ac97_codec_warm_reset(struct snd_ac97 *ac97) |
| 70 | { |
| 71 | u32 readback; |
| 72 | unsigned long timeout; |
| 73 | |
| 74 | /* |
| 75 | * although sync line is driven by the DAC pad group warm reset using |
| 76 | * the controller cmd is not working, have to toggle sync line |
| 77 | * manually. |
| 78 | */ |
| 79 | gpio_request(workdata->sync_gpio, "codec-sync"); |
| 80 | |
| 81 | gpio_direction_output(workdata->sync_gpio, 1); |
| 82 | |
| 83 | udelay(2); |
| 84 | gpio_set_value(workdata->sync_gpio, 0); |
| 85 | udelay(2); |
| 86 | gpio_free(workdata->sync_gpio); |
| 87 | |
| 88 | timeout = jiffies + msecs_to_jiffies(100); |
| 89 | |
| 90 | do { |
| 91 | regmap_read(workdata->regmap, TEGRA20_AC97_STATUS1, &readback); |
| 92 | if (readback & TEGRA20_AC97_STATUS1_CODEC1_RDY) |
| 93 | break; |
| 94 | usleep_range(1000, 2000); |
| 95 | } while (!time_after(jiffies, timeout)); |
| 96 | } |
| 97 | |
| 98 | static unsigned short tegra20_ac97_codec_read(struct snd_ac97 *ac97_snd, |
| 99 | unsigned short reg) |
| 100 | { |
| 101 | u32 readback; |
| 102 | unsigned long timeout; |
| 103 | |
| 104 | regmap_write(workdata->regmap, TEGRA20_AC97_CMD, |
| 105 | (((reg | 0x80) << TEGRA20_AC97_CMD_CMD_ADDR_SHIFT) & |
| 106 | TEGRA20_AC97_CMD_CMD_ADDR_MASK) | |
| 107 | TEGRA20_AC97_CMD_BUSY); |
| 108 | |
| 109 | timeout = jiffies + msecs_to_jiffies(100); |
| 110 | |
| 111 | do { |
| 112 | regmap_read(workdata->regmap, TEGRA20_AC97_STATUS1, &readback); |
| 113 | if (readback & TEGRA20_AC97_STATUS1_STA_VALID1) |
| 114 | break; |
| 115 | usleep_range(1000, 2000); |
| 116 | } while (!time_after(jiffies, timeout)); |
| 117 | |
| 118 | return ((readback & TEGRA20_AC97_STATUS1_STA_DATA1_MASK) >> |
| 119 | TEGRA20_AC97_STATUS1_STA_DATA1_SHIFT); |
| 120 | } |
| 121 | |
| 122 | static void tegra20_ac97_codec_write(struct snd_ac97 *ac97_snd, |
| 123 | unsigned short reg, unsigned short val) |
| 124 | { |
| 125 | u32 readback; |
| 126 | unsigned long timeout; |
| 127 | |
| 128 | regmap_write(workdata->regmap, TEGRA20_AC97_CMD, |
| 129 | ((reg << TEGRA20_AC97_CMD_CMD_ADDR_SHIFT) & |
| 130 | TEGRA20_AC97_CMD_CMD_ADDR_MASK) | |
| 131 | ((val << TEGRA20_AC97_CMD_CMD_DATA_SHIFT) & |
| 132 | TEGRA20_AC97_CMD_CMD_DATA_MASK) | |
| 133 | TEGRA20_AC97_CMD_BUSY); |
| 134 | |
| 135 | timeout = jiffies + msecs_to_jiffies(100); |
| 136 | |
| 137 | do { |
| 138 | regmap_read(workdata->regmap, TEGRA20_AC97_CMD, &readback); |
| 139 | if (!(readback & TEGRA20_AC97_CMD_BUSY)) |
| 140 | break; |
| 141 | usleep_range(1000, 2000); |
| 142 | } while (!time_after(jiffies, timeout)); |
| 143 | } |
| 144 | |
Mark Brown | b047e1c | 2013-06-26 12:45:59 +0100 | [diff] [blame] | 145 | static struct snd_ac97_bus_ops tegra20_ac97_ops = { |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 146 | .read = tegra20_ac97_codec_read, |
| 147 | .write = tegra20_ac97_codec_write, |
| 148 | .reset = tegra20_ac97_codec_reset, |
| 149 | .warm_reset = tegra20_ac97_codec_warm_reset, |
| 150 | }; |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 151 | |
| 152 | static inline void tegra20_ac97_start_playback(struct tegra20_ac97 *ac97) |
| 153 | { |
| 154 | regmap_update_bits(ac97->regmap, TEGRA20_AC97_FIFO1_SCR, |
| 155 | TEGRA20_AC97_FIFO_SCR_PB_QRT_MT_EN, |
| 156 | TEGRA20_AC97_FIFO_SCR_PB_QRT_MT_EN); |
| 157 | |
| 158 | regmap_update_bits(ac97->regmap, TEGRA20_AC97_CTRL, |
| 159 | TEGRA20_AC97_CTRL_PCM_DAC_EN | |
| 160 | TEGRA20_AC97_CTRL_STM_EN, |
| 161 | TEGRA20_AC97_CTRL_PCM_DAC_EN | |
| 162 | TEGRA20_AC97_CTRL_STM_EN); |
| 163 | } |
| 164 | |
| 165 | static inline void tegra20_ac97_stop_playback(struct tegra20_ac97 *ac97) |
| 166 | { |
| 167 | regmap_update_bits(ac97->regmap, TEGRA20_AC97_FIFO1_SCR, |
| 168 | TEGRA20_AC97_FIFO_SCR_PB_QRT_MT_EN, 0); |
| 169 | |
| 170 | regmap_update_bits(ac97->regmap, TEGRA20_AC97_CTRL, |
| 171 | TEGRA20_AC97_CTRL_PCM_DAC_EN, 0); |
| 172 | } |
| 173 | |
| 174 | static inline void tegra20_ac97_start_capture(struct tegra20_ac97 *ac97) |
| 175 | { |
| 176 | regmap_update_bits(ac97->regmap, TEGRA20_AC97_FIFO1_SCR, |
| 177 | TEGRA20_AC97_FIFO_SCR_REC_FULL_EN, |
| 178 | TEGRA20_AC97_FIFO_SCR_REC_FULL_EN); |
| 179 | } |
| 180 | |
| 181 | static inline void tegra20_ac97_stop_capture(struct tegra20_ac97 *ac97) |
| 182 | { |
| 183 | regmap_update_bits(ac97->regmap, TEGRA20_AC97_FIFO1_SCR, |
| 184 | TEGRA20_AC97_FIFO_SCR_REC_FULL_EN, 0); |
| 185 | } |
| 186 | |
| 187 | static int tegra20_ac97_trigger(struct snd_pcm_substream *substream, int cmd, |
| 188 | struct snd_soc_dai *dai) |
| 189 | { |
| 190 | struct tegra20_ac97 *ac97 = snd_soc_dai_get_drvdata(dai); |
| 191 | |
| 192 | switch (cmd) { |
| 193 | case SNDRV_PCM_TRIGGER_START: |
| 194 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
| 195 | case SNDRV_PCM_TRIGGER_RESUME: |
| 196 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 197 | tegra20_ac97_start_playback(ac97); |
| 198 | else |
| 199 | tegra20_ac97_start_capture(ac97); |
| 200 | break; |
| 201 | case SNDRV_PCM_TRIGGER_STOP: |
| 202 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
| 203 | case SNDRV_PCM_TRIGGER_SUSPEND: |
| 204 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 205 | tegra20_ac97_stop_playback(ac97); |
| 206 | else |
| 207 | tegra20_ac97_stop_capture(ac97); |
| 208 | break; |
| 209 | default: |
| 210 | return -EINVAL; |
| 211 | } |
| 212 | |
| 213 | return 0; |
| 214 | } |
| 215 | |
| 216 | static const struct snd_soc_dai_ops tegra20_ac97_dai_ops = { |
| 217 | .trigger = tegra20_ac97_trigger, |
| 218 | }; |
| 219 | |
| 220 | static int tegra20_ac97_probe(struct snd_soc_dai *dai) |
| 221 | { |
| 222 | struct tegra20_ac97 *ac97 = snd_soc_dai_get_drvdata(dai); |
| 223 | |
| 224 | dai->capture_dma_data = &ac97->capture_dma_data; |
| 225 | dai->playback_dma_data = &ac97->playback_dma_data; |
| 226 | |
| 227 | return 0; |
| 228 | } |
| 229 | |
| 230 | static struct snd_soc_dai_driver tegra20_ac97_dai = { |
| 231 | .name = "tegra-ac97-pcm", |
| 232 | .ac97_control = 1, |
| 233 | .probe = tegra20_ac97_probe, |
| 234 | .playback = { |
| 235 | .stream_name = "PCM Playback", |
| 236 | .channels_min = 2, |
| 237 | .channels_max = 2, |
| 238 | .rates = SNDRV_PCM_RATE_8000_48000, |
| 239 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 240 | }, |
| 241 | .capture = { |
| 242 | .stream_name = "PCM Capture", |
| 243 | .channels_min = 2, |
| 244 | .channels_max = 2, |
| 245 | .rates = SNDRV_PCM_RATE_8000_48000, |
| 246 | .formats = SNDRV_PCM_FMTBIT_S16_LE, |
| 247 | }, |
| 248 | .ops = &tegra20_ac97_dai_ops, |
| 249 | }; |
| 250 | |
Kuninori Morimoto | 359e2cb | 2013-03-21 03:37:44 -0700 | [diff] [blame] | 251 | static const struct snd_soc_component_driver tegra20_ac97_component = { |
| 252 | .name = DRV_NAME, |
| 253 | }; |
| 254 | |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 255 | static bool tegra20_ac97_wr_rd_reg(struct device *dev, unsigned int reg) |
| 256 | { |
| 257 | switch (reg) { |
| 258 | case TEGRA20_AC97_CTRL: |
| 259 | case TEGRA20_AC97_CMD: |
| 260 | case TEGRA20_AC97_STATUS1: |
| 261 | case TEGRA20_AC97_FIFO1_SCR: |
| 262 | case TEGRA20_AC97_FIFO_TX1: |
| 263 | case TEGRA20_AC97_FIFO_RX1: |
| 264 | return true; |
| 265 | default: |
| 266 | break; |
| 267 | } |
| 268 | |
| 269 | return false; |
| 270 | } |
| 271 | |
| 272 | static bool tegra20_ac97_volatile_reg(struct device *dev, unsigned int reg) |
| 273 | { |
| 274 | switch (reg) { |
| 275 | case TEGRA20_AC97_STATUS1: |
| 276 | case TEGRA20_AC97_FIFO1_SCR: |
| 277 | case TEGRA20_AC97_FIFO_TX1: |
| 278 | case TEGRA20_AC97_FIFO_RX1: |
| 279 | return true; |
| 280 | default: |
| 281 | break; |
| 282 | } |
| 283 | |
| 284 | return false; |
| 285 | } |
| 286 | |
| 287 | static bool tegra20_ac97_precious_reg(struct device *dev, unsigned int reg) |
| 288 | { |
| 289 | switch (reg) { |
| 290 | case TEGRA20_AC97_FIFO_TX1: |
| 291 | case TEGRA20_AC97_FIFO_RX1: |
| 292 | return true; |
| 293 | default: |
| 294 | break; |
| 295 | } |
| 296 | |
| 297 | return false; |
| 298 | } |
| 299 | |
| 300 | static const struct regmap_config tegra20_ac97_regmap_config = { |
| 301 | .reg_bits = 32, |
| 302 | .reg_stride = 4, |
| 303 | .val_bits = 32, |
| 304 | .max_register = TEGRA20_AC97_FIFO_RX1, |
| 305 | .writeable_reg = tegra20_ac97_wr_rd_reg, |
| 306 | .readable_reg = tegra20_ac97_wr_rd_reg, |
| 307 | .volatile_reg = tegra20_ac97_volatile_reg, |
| 308 | .precious_reg = tegra20_ac97_precious_reg, |
| 309 | .cache_type = REGCACHE_RBTREE, |
| 310 | }; |
| 311 | |
| 312 | static int tegra20_ac97_platform_probe(struct platform_device *pdev) |
| 313 | { |
| 314 | struct tegra20_ac97 *ac97; |
Thierry Reding | 8a08f4c | 2013-06-28 21:53:25 +0200 | [diff] [blame] | 315 | struct resource *mem; |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 316 | u32 of_dma[2]; |
| 317 | void __iomem *regs; |
| 318 | int ret = 0; |
| 319 | |
| 320 | ac97 = devm_kzalloc(&pdev->dev, sizeof(struct tegra20_ac97), |
| 321 | GFP_KERNEL); |
| 322 | if (!ac97) { |
| 323 | dev_err(&pdev->dev, "Can't allocate tegra20_ac97\n"); |
| 324 | ret = -ENOMEM; |
| 325 | goto err; |
| 326 | } |
| 327 | dev_set_drvdata(&pdev->dev, ac97); |
| 328 | |
Mark Brown | cfe6864 | 2013-06-26 12:16:50 +0100 | [diff] [blame] | 329 | ac97->clk_ac97 = devm_clk_get(&pdev->dev, NULL); |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 330 | if (IS_ERR(ac97->clk_ac97)) { |
| 331 | dev_err(&pdev->dev, "Can't retrieve ac97 clock\n"); |
| 332 | ret = PTR_ERR(ac97->clk_ac97); |
| 333 | goto err; |
| 334 | } |
| 335 | |
| 336 | mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); |
Mark Brown | 2def251 | 2013-06-26 12:18:39 +0100 | [diff] [blame] | 337 | regs = devm_ioremap_resource(&pdev->dev, mem); |
| 338 | if (IS_ERR(regs)) { |
| 339 | ret = PTR_ERR(regs); |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 340 | goto err_clk_put; |
| 341 | } |
| 342 | |
| 343 | ac97->regmap = devm_regmap_init_mmio(&pdev->dev, regs, |
| 344 | &tegra20_ac97_regmap_config); |
| 345 | if (IS_ERR(ac97->regmap)) { |
| 346 | dev_err(&pdev->dev, "regmap init failed\n"); |
| 347 | ret = PTR_ERR(ac97->regmap); |
| 348 | goto err_clk_put; |
| 349 | } |
| 350 | |
| 351 | if (of_property_read_u32_array(pdev->dev.of_node, |
| 352 | "nvidia,dma-request-selector", |
| 353 | of_dma, 2) < 0) { |
| 354 | dev_err(&pdev->dev, "No DMA resource\n"); |
| 355 | ret = -ENODEV; |
| 356 | goto err_clk_put; |
| 357 | } |
| 358 | |
| 359 | ac97->reset_gpio = of_get_named_gpio(pdev->dev.of_node, |
| 360 | "nvidia,codec-reset-gpio", 0); |
| 361 | if (gpio_is_valid(ac97->reset_gpio)) { |
| 362 | ret = devm_gpio_request_one(&pdev->dev, ac97->reset_gpio, |
| 363 | GPIOF_OUT_INIT_HIGH, "codec-reset"); |
| 364 | if (ret) { |
| 365 | dev_err(&pdev->dev, "could not get codec-reset GPIO\n"); |
| 366 | goto err_clk_put; |
| 367 | } |
| 368 | } else { |
| 369 | dev_err(&pdev->dev, "no codec-reset GPIO supplied\n"); |
| 370 | goto err_clk_put; |
| 371 | } |
| 372 | |
| 373 | ac97->sync_gpio = of_get_named_gpio(pdev->dev.of_node, |
| 374 | "nvidia,codec-sync-gpio", 0); |
| 375 | if (!gpio_is_valid(ac97->sync_gpio)) { |
| 376 | dev_err(&pdev->dev, "no codec-sync GPIO supplied\n"); |
| 377 | goto err_clk_put; |
| 378 | } |
| 379 | |
| 380 | ac97->capture_dma_data.addr = mem->start + TEGRA20_AC97_FIFO_RX1; |
Lars-Peter Clausen | 3489d50 | 2013-04-03 11:06:03 +0200 | [diff] [blame] | 381 | ac97->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 382 | ac97->capture_dma_data.maxburst = 4; |
| 383 | ac97->capture_dma_data.slave_id = of_dma[1]; |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 384 | |
| 385 | ac97->playback_dma_data.addr = mem->start + TEGRA20_AC97_FIFO_TX1; |
Richard Zhao | 647ab78 | 2013-07-21 10:34:09 +0800 | [diff] [blame] | 386 | ac97->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; |
| 387 | ac97->playback_dma_data.maxburst = 4; |
| 388 | ac97->playback_dma_data.slave_id = of_dma[1]; |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 389 | |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 390 | ret = tegra_asoc_utils_init(&ac97->util_data, &pdev->dev); |
| 391 | if (ret) |
Mark Brown | 65fb3e7 | 2013-06-26 12:27:58 +0100 | [diff] [blame] | 392 | goto err_clk_put; |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 393 | |
| 394 | ret = tegra_asoc_utils_set_ac97_rate(&ac97->util_data); |
| 395 | if (ret) |
| 396 | goto err_asoc_utils_fini; |
| 397 | |
| 398 | ret = clk_prepare_enable(ac97->clk_ac97); |
| 399 | if (ret) { |
| 400 | dev_err(&pdev->dev, "clk_enable failed: %d\n", ret); |
| 401 | goto err_asoc_utils_fini; |
| 402 | } |
| 403 | |
Mark Brown | b047e1c | 2013-06-26 12:45:59 +0100 | [diff] [blame] | 404 | ret = snd_soc_set_ac97_ops(&tegra20_ac97_ops); |
| 405 | if (ret) { |
| 406 | dev_err(&pdev->dev, "Failed to set AC'97 ops: %d\n", ret); |
| 407 | goto err_asoc_utils_fini; |
| 408 | } |
| 409 | |
Mark Brown | 65fb3e7 | 2013-06-26 12:27:58 +0100 | [diff] [blame] | 410 | ret = snd_soc_register_component(&pdev->dev, &tegra20_ac97_component, |
| 411 | &tegra20_ac97_dai, 1); |
| 412 | if (ret) { |
| 413 | dev_err(&pdev->dev, "Could not register DAI: %d\n", ret); |
| 414 | ret = -ENOMEM; |
| 415 | goto err_asoc_utils_fini; |
| 416 | } |
| 417 | |
| 418 | ret = tegra_pcm_platform_register(&pdev->dev); |
| 419 | if (ret) { |
| 420 | dev_err(&pdev->dev, "Could not register PCM: %d\n", ret); |
| 421 | goto err_unregister_component; |
| 422 | } |
| 423 | |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 424 | /* XXX: crufty ASoC AC97 API - only one AC97 codec allowed */ |
| 425 | workdata = ac97; |
| 426 | |
| 427 | return 0; |
| 428 | |
Kuninori Morimoto | 359e2cb | 2013-03-21 03:37:44 -0700 | [diff] [blame] | 429 | err_unregister_component: |
| 430 | snd_soc_unregister_component(&pdev->dev); |
Mark Brown | 65fb3e7 | 2013-06-26 12:27:58 +0100 | [diff] [blame] | 431 | err_asoc_utils_fini: |
| 432 | tegra_asoc_utils_fini(&ac97->util_data); |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 433 | err_clk_put: |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 434 | err: |
Mark Brown | b047e1c | 2013-06-26 12:45:59 +0100 | [diff] [blame] | 435 | snd_soc_set_ac97_ops(NULL); |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 436 | return ret; |
| 437 | } |
| 438 | |
| 439 | static int tegra20_ac97_platform_remove(struct platform_device *pdev) |
| 440 | { |
| 441 | struct tegra20_ac97 *ac97 = dev_get_drvdata(&pdev->dev); |
| 442 | |
| 443 | tegra_pcm_platform_unregister(&pdev->dev); |
Kuninori Morimoto | 359e2cb | 2013-03-21 03:37:44 -0700 | [diff] [blame] | 444 | snd_soc_unregister_component(&pdev->dev); |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 445 | |
| 446 | tegra_asoc_utils_fini(&ac97->util_data); |
| 447 | |
| 448 | clk_disable_unprepare(ac97->clk_ac97); |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 449 | |
Mark Brown | b047e1c | 2013-06-26 12:45:59 +0100 | [diff] [blame] | 450 | snd_soc_set_ac97_ops(NULL); |
| 451 | |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 452 | return 0; |
| 453 | } |
| 454 | |
Sachin Kamat | d58579e | 2013-01-24 14:51:16 +0530 | [diff] [blame] | 455 | static const struct of_device_id tegra20_ac97_of_match[] = { |
Lucas Stach | 609dad9 | 2013-01-05 02:18:43 +0100 | [diff] [blame] | 456 | { .compatible = "nvidia,tegra20-ac97", }, |
| 457 | {}, |
| 458 | }; |
| 459 | |
| 460 | static struct platform_driver tegra20_ac97_driver = { |
| 461 | .driver = { |
| 462 | .name = DRV_NAME, |
| 463 | .owner = THIS_MODULE, |
| 464 | .of_match_table = tegra20_ac97_of_match, |
| 465 | }, |
| 466 | .probe = tegra20_ac97_platform_probe, |
| 467 | .remove = tegra20_ac97_platform_remove, |
| 468 | }; |
| 469 | module_platform_driver(tegra20_ac97_driver); |
| 470 | |
| 471 | MODULE_AUTHOR("Lucas Stach"); |
| 472 | MODULE_DESCRIPTION("Tegra20 AC97 ASoC driver"); |
| 473 | MODULE_LICENSE("GPL v2"); |
| 474 | MODULE_ALIAS("platform:" DRV_NAME); |
| 475 | MODULE_DEVICE_TABLE(of, tegra20_ac97_of_match); |